WO2022250116A1 - 逆浸透複合膜 - Google Patents
逆浸透複合膜 Download PDFInfo
- Publication number
- WO2022250116A1 WO2022250116A1 PCT/JP2022/021572 JP2022021572W WO2022250116A1 WO 2022250116 A1 WO2022250116 A1 WO 2022250116A1 JP 2022021572 W JP2022021572 W JP 2022021572W WO 2022250116 A1 WO2022250116 A1 WO 2022250116A1
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- WO
- WIPO (PCT)
- Prior art keywords
- reverse osmosis
- compound
- group
- composite
- membrane
- Prior art date
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- 239000012528 membrane Substances 0.000 title claims abstract description 143
- 238000001223 reverse osmosis Methods 0.000 title claims abstract description 140
- 239000002131 composite material Substances 0.000 title claims abstract description 126
- 150000001875 compounds Chemical class 0.000 claims abstract description 113
- KXZQYLBVMZGIKC-UHFFFAOYSA-N 1-pyridin-2-yl-n-(pyridin-2-ylmethyl)methanamine Chemical group C=1C=CC=NC=1CNCC1=CC=CC=N1 KXZQYLBVMZGIKC-UHFFFAOYSA-N 0.000 claims abstract description 33
- 125000003277 amino group Chemical group 0.000 claims abstract description 25
- -1 α-picolyl group Chemical group 0.000 claims abstract description 10
- 229910052751 metal Inorganic materials 0.000 claims description 31
- 239000002184 metal Substances 0.000 claims description 31
- 125000004432 carbon atom Chemical group C* 0.000 claims description 12
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 8
- 125000003545 alkoxy group Chemical group 0.000 claims description 6
- 125000000217 alkyl group Chemical group 0.000 claims description 6
- 125000005843 halogen group Chemical group 0.000 claims description 6
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 6
- 125000004093 cyano group Chemical group *C#N 0.000 claims description 4
- 125000000524 functional group Chemical group 0.000 claims description 4
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 claims description 4
- 238000000034 method Methods 0.000 description 22
- 239000007864 aqueous solution Substances 0.000 description 21
- 229920000642 polymer Polymers 0.000 description 19
- 230000000844 anti-bacterial effect Effects 0.000 description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 17
- 239000011701 zinc Substances 0.000 description 13
- 241000894006 Bacteria Species 0.000 description 12
- 238000012360 testing method Methods 0.000 description 12
- ONDPHDOFVYQSGI-UHFFFAOYSA-N zinc nitrate Chemical compound [Zn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ONDPHDOFVYQSGI-UHFFFAOYSA-N 0.000 description 12
- 239000013535 sea water Substances 0.000 description 10
- 239000013505 freshwater Substances 0.000 description 9
- SXGZJKUKBWWHRA-UHFFFAOYSA-N 2-(N-morpholiniumyl)ethanesulfonate Chemical compound [O-]S(=O)(=O)CC[NH+]1CCOCC1 SXGZJKUKBWWHRA-UHFFFAOYSA-N 0.000 description 8
- 239000003795 chemical substances by application Substances 0.000 description 7
- LMDZBCPBFSXMTL-UHFFFAOYSA-N 1-Ethyl-3-(3-dimethylaminopropyl)carbodiimide Substances CCN=C=NCCCN(C)C LMDZBCPBFSXMTL-UHFFFAOYSA-N 0.000 description 6
- 239000003242 anti bacterial agent Substances 0.000 description 6
- 229940088710 antibiotic agent Drugs 0.000 description 6
- 241000588724 Escherichia coli Species 0.000 description 5
- 239000000178 monomer Substances 0.000 description 5
- 241000158640 Acanthodactylus aureus Species 0.000 description 4
- 230000001580 bacterial effect Effects 0.000 description 4
- 239000007853 buffer solution Substances 0.000 description 4
- 230000005764 inhibitory process Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- FPQQSJJWHUJYPU-UHFFFAOYSA-N 3-(dimethylamino)propyliminomethylidene-ethylazanium;chloride Chemical compound Cl.CCN=C=NCCCN(C)C FPQQSJJWHUJYPU-UHFFFAOYSA-N 0.000 description 3
- 241001360526 Escherichia coli ATCC 25922 Species 0.000 description 3
- NQTADLQHYWFPDB-UHFFFAOYSA-N N-Hydroxysuccinimide Chemical compound ON1C(=O)CCC1=O NQTADLQHYWFPDB-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 229910052801 chlorine Inorganic materials 0.000 description 3
- 238000012258 culturing Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 239000002054 inoculum Substances 0.000 description 3
- 102000004169 proteins and genes Human genes 0.000 description 3
- 108090000623 proteins and genes Proteins 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 229910052725 zinc Inorganic materials 0.000 description 3
- 241000589877 Campylobacter coli Species 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- 241000032203 Conus aureus Species 0.000 description 2
- 102100035925 DNA methyltransferase 1-associated protein 1 Human genes 0.000 description 2
- WHUUTDBJXJRKMK-UHFFFAOYSA-N Glutamic acid Natural products OC(=O)C(N)CCC(O)=O WHUUTDBJXJRKMK-UHFFFAOYSA-N 0.000 description 2
- 101000930289 Homo sapiens DNA methyltransferase 1-associated protein 1 Proteins 0.000 description 2
- 241000064099 Massilioclostridium coli Species 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 230000000845 anti-microbial effect Effects 0.000 description 2
- 239000004760 aramid Substances 0.000 description 2
- 229920003235 aromatic polyamide Polymers 0.000 description 2
- 150000001718 carbodiimides Chemical class 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 235000013922 glutamic acid Nutrition 0.000 description 2
- 239000004220 glutamic acid Substances 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 229920002492 poly(sulfone) Polymers 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 235000018102 proteins Nutrition 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000001308 synthesis method Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 125000005917 3-methylpentyl group Chemical group 0.000 description 1
- 125000005925 3-methylpentyloxy group Chemical group 0.000 description 1
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical group [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- 208000035143 Bacterial infection Diseases 0.000 description 1
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical group [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- 206010059866 Drug resistance Diseases 0.000 description 1
- 241000391102 Epipyxis aureus Species 0.000 description 1
- 241000192125 Firmicutes Species 0.000 description 1
- 229920002873 Polyethylenimine Polymers 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 208000022362 bacterial infectious disease Diseases 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 210000000170 cell membrane Anatomy 0.000 description 1
- 125000001309 chloro group Chemical group Cl* 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000005115 demineralization Methods 0.000 description 1
- 230000002328 demineralizing effect Effects 0.000 description 1
- 238000001212 derivatisation Methods 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 125000001153 fluoro group Chemical group F* 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 1
- 125000004491 isohexyl group Chemical group C(CCC(C)C)* 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000001298 n-hexoxy group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])O* 0.000 description 1
- 125000001280 n-hexyl group Chemical group C(CCCCC)* 0.000 description 1
- 125000003935 n-pentoxy group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])O* 0.000 description 1
- 125000000740 n-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000005484 neopentoxy group Chemical group 0.000 description 1
- 125000001971 neopentyl group Chemical group [H]C([*])([H])C(C([H])([H])[H])(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229920000083 poly(allylamine) Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 150000003141 primary amines Chemical class 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000009938 salting Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000003115 supporting electrolyte Substances 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 239000013076 target substance Substances 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0081—After-treatment of organic or inorganic membranes
- B01D67/0093—Chemical modification
- B01D67/00931—Chemical modification by introduction of specific groups after membrane formation, e.g. by grafting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2323/00—Details relating to membrane preparation
- B01D2323/15—Use of additives
- B01D2323/218—Additive materials
- B01D2323/2182—Organic additives
- B01D2323/21834—Amines
- B01D2323/21836—Cyclic amines comprising aromatic heterocyclic N-Ring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2323/00—Details relating to membrane preparation
- B01D2323/15—Use of additives
- B01D2323/218—Additive materials
- B01D2323/2182—Organic additives
- B01D2323/21839—Polymeric additives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2325/00—Details relating to properties of membranes
- B01D2325/48—Antimicrobial properties
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
Definitions
- the present invention relates to reverse osmosis composite membranes.
- Antibiotics are powerful tools against bacterial infections.
- various antibiotics have been developed that target proteins synthesized by bacteria.
- bacteria acquire drug resistance to conventional antibiotics by methods such as changing the structure of proteins that are targets of antibiotics. Therefore, conventional protein-targeted antibiotics have not been sufficient to fight infections.
- RO membranes are widely used in the field of producing fresh water from seawater and in the field of water purification.
- RO reverse osmosis
- microorganisms adhere to the surface of the reverse osmosis membrane and proliferate, forming a biofilm on the surface of the reverse osmosis membrane.
- the water permeability of the reverse osmosis membrane decreases. This creates a problem of biofouling.
- development of techniques for preventing biofouling is underway.
- water to be treated containing a chlorine-based oxidant and a slime control agent is treated with a reverse osmosis membrane arranged upstream of the treatment process and a reverse osmosis membrane arranged downstream of the treatment process.
- a water treatment method is described in which the treated water is obtained by separating by and.
- the chlorine-based oxidizing agent with a fast reaction rate is mainly used to suppress biofouling in the reverse osmosis membrane arranged on the upstream side of the treatment process
- the slime control agent with a slow reaction rate is used to suppress the biofouling of the treatment process. It suppresses biofouling in the reverse osmosis membrane arranged downstream.
- reverse osmosis membranes used in the conventional technologies described above do not have sufficient ability to suppress biofouling, and there is a demand for the development of new reverse osmosis membranes that can suppress biofouling.
- One aspect of the present invention aims to realize a new reverse osmosis membrane (more specifically, a reverse osmosis composite membrane) capable of suppressing biofouling.
- the composite reverse osmosis membrane according to one embodiment of the present invention is a compound having an amino group, and the amino group is modified with two molecules of ⁇ -picolyl group, represented by the following formula (1)
- a compound having a dipicolylamine structure is chemically modified on the surface:
- R is independently selected from the group consisting of a hydrogen atom, a halogen atom, a nitro group, a cyano group, an amino group, an alkyl group having 1 to 6 carbon atoms, and an alkoxy group having 1 to 6 carbon atoms. and may be the same or different, and the dipicolylamine structure may be complexed with the metal M).
- a new reverse osmosis membrane (more specifically, a reverse osmosis composite membrane) capable of suppressing biofouling can be realized.
- FIG. 4 is a graph showing the evaluation results of the antibacterial activity of the composite reverse osmosis membrane (composite reverse osmosis membrane to which a monomeric compound is bound) according to one embodiment of the present invention.
- the composite reverse osmosis membrane of one embodiment of the present invention is a compound having an amino group, the dipicolylamine structure represented by the formula (1) obtained by modifying the amino group with two molecules of an ⁇ -picolyl group.
- the composite reverse osmosis membrane of one embodiment of the present invention is a compound having an amino group, the dipicolylamine structure represented by the formula (1) obtained by modifying the amino group with two molecules of an ⁇ -picolyl group. It may be a composite reverse osmosis membrane in which a compound having is provided on the surface (the surface of the composite reverse osmosis membrane).
- the compound having an amino group may be a polymer-type compound or a monomer-type compound.
- R is each independently selected from the group consisting of a hydrogen atom, a halogen atom, a nitro group, a cyano group, an amino group, an alkyl group having 1 to 6 carbon atoms, and an alkoxy group having 1 to 6 carbon atoms. selected and may be the same or different.
- the halogen atom that can be R in formula (1) is not particularly limited.
- Examples of the halogen atom include fluorine atom, chlorine atom, bromine atom and iodine atom.
- the alkyl group having 1 to 6 carbon atoms that can be R in formula (1) is not particularly limited.
- Examples of the alkyl group having 1 to 6 carbon atoms include methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, tert-butyl group, sec-butyl group and n-pentyl group. , neopentyl group, n-hexyl group, isohexyl group, 3-methylpentyl group and the like.
- the alkoxy group having 1 to 6 carbon atoms that can be R in formula (1) is not particularly limited.
- Examples of the alkoxy group having 1 to 6 carbon atoms include methoxy, ethoxy, n-propoxy, isopropoxy, n-butoxy, isobutoxy, tert-butoxy, sec-butoxy and n-pentoxy. group, neopentoxy group, n-hexyloxy group, isohexyloxy group, 3-methylpentoxy group and the like.
- R is preferably one or more independently selected from the group consisting of a hydrogen atom and a methyl group, more preferably a hydrogen atom.
- the dipicolylamine structure represented by formula (1) may form a complex with the metal M or may not form a complex with the metal M.
- the metal M include divalent metals, more specifically Zn, Cu, Mg, Ca, Ni, Fe, Co and Mn. Among them, Zn is more preferable as the metal M. Zn can be abundantly present in living organisms. Therefore, when the metal M is Zn, the toxicity of the compound to organisms whose growth is not to be inhibited can be suppressed.
- the dipicolylamine structure represented by formula (1) preferably forms a complex with the metal M.
- the antibacterial activity of the compound in polymer form can be further increased.
- the dipicolylamine structure forms a complex with the metal M, thereby increasing the positive charge of the compound and selectively recognizing the compound by microorganisms. and/or increased connectivity. Therefore, it is considered that the antimicrobial activity of the compound is further enhanced.
- the dipicolylamine structure represented by formula (1) preferably does not form a complex with the metal M.
- the monomeric form of the compound has high antibacterial activity even though the dipicolylamine structure is not complexed with the metal M. Therefore, with this configuration, the metal M is not required during the manufacture, reproduction and / or reuse of the reverse osmosis composite membrane, which is industrially advantageous (for example, inexpensively and simply, It is not necessary to manufacture a reverse osmosis composite membrane, or to coordinate the metal M again when reused, etc.).
- the compound is preferably represented by the following formula (2) (for example, a compound in the form of a polymer).
- the compound is preferably represented by the following formula (3) (for example, a monomeric compound).
- n is an integer of 1 or more
- X is a functional group that bonds with the carboxyl group.
- Preferred examples of the functional group that binds to the carboxyl group include an amino group and a hydroxyl group, since they can easily bind to the carboxyl group.
- X is more preferably an amino group because it can form an amide bond that does not hydrolyze, in other words, it has excellent bond stability with a carboxyl group.
- Examples of n include integers from 1 to 20, integers from 1 to 15, integers from 1 to 10, integers from 1 to 5, and integers from 1 to 3.
- the compound represented by formula (3) (for example, a compound in the form of a monomer) is chemically modified into a composite reverse osmosis membrane, as shown in the examples described later, the compound in the form of a polymer is chemically modified into the composite reverse osmosis membrane.
- a deterioration in water permeability (for example, flow velocity) can be suppressed as compared with the case of modification. Therefore, the compound represented by formula (3) can further improve the performance of the composite reverse osmosis membrane.
- the compound is (i) represented by the above formula (2), (ii) represented by the above formula (3), or (iii) (iii-a) represented by the above formula (2) and (iii-b) a mixture of the compound represented by the above formula (3).
- the compound is (i) represented by the formula (2), (ii) the dipicolylamine structure does not form a complex with the metal M, and is represented by the formula (3) or (iii) (iii-a) represented by the above formula (2), and (iii-b) the dipicolylamine structure does not form a complex with the metal M, and the above formula (3) and a mixture are preferred.
- the compound includes (i) the dipicolylamine structure forming a complex with the metal M and represented by the above formula (2), (ii) the dipicolylamine structure and the metal M It does not form a complex and is represented by the above formula (3), or (iii) (iii-a) the dipicolylamine structure forms a complex with the metal M, and a compound represented by the above formula (2) and (iii-b) a compound in which the dipicolylamine structure does not form a complex with the metal M and a compound represented by the above formula (3) and a mixture , preferably.
- the molecular weight of the compound for example, one or more molecular weights selected from the group consisting of number average molecular weight, weight average molecular weight and yearly average molecular weight, is not particularly limited and can be set as appropriate. For example, it is preferably from 200 to 100,000, more preferably from 300 to 10,000, even more preferably from 500 to 5,000, and particularly preferably from 750 to 3,000.
- the molecular weight of the compound is preferably a number average molecular weight.
- the molecular weight of the compound is preferably a weight average molecular weight.
- the number average molecular weight may be a number average molecular weight calculated by a viscosity method, or may be a number average molecular weight calculated based on boiling point elevation.
- the compound to be chemically modified in the composite reverse osmosis membrane it is possible to use synthetically produced compounds or commercially available compounds.
- a method for synthesizing the above compound is not limited, and a known synthesis method can be used as appropriate.
- the synthesis method described in WO2019/230543 A1 or European Journal of Medicinal Chemistry, 174, 181-197; 2019 can be used.
- WO2019/230543 A1 is incorporated herein by reference.
- the material that constitutes the reverse osmosis composite membrane before being chemically modified is not limited, and examples include aromatic polyamide and polysulfone.
- the reverse osmosis composite membrane of one embodiment of the present invention can be, for example, a reverse osmosis composite membrane in which the surface of aromatic polyamide is chemically modified, or a reverse osmosis composite membrane in which the surface of polysulfone is chemically modified.
- the method of providing the surface of the is not limited, and a method utilizing a known chemical reaction may be used as appropriate.
- the compound having a dipicolylamine structure represented by formula (1) may be directly bound to the surface of the reverse osmosis composite membrane, or may contain other components (e.g., linker, activator, glutamic acid It may be indirectly bonded to the surface of the composite reverse osmosis membrane via a polyamide layer, etc.).
- EDC 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride
- an active esterifying agent eg, N-hydroxysuccinimide (NHS), etc.
- the reverse osmosis composite membrane according to one embodiment of the present invention can be said to be a reverse osmosis composite membrane obtained by immersing the reverse osmosis membrane in an aqueous solution containing the compound according to one embodiment of the present invention.
- the reverse osmosis composite membrane immersed in the aqueous solution containing the compound may be, for example, a reverse osmosis composite membrane in which the compound is not chemically modified on the surface, and the compound is already chemically modified on the surface. It may be a composite membrane.
- the time for which the composite reverse osmosis membrane is immersed in the aqueous solution containing the above compounds is not particularly limited.
- the concentration of the compound in the aqueous solution containing the compound is not particularly limited.
- the concentration is, for example, preferably 0.01% to 5% by weight, more preferably 0.01% to 3% by weight, and even more preferably 0.01% to 1% by weight, based on 100% by weight of the aqueous solution.
- the above concentration may be 0.1% by weight or less in 100% by weight of the aqueous solution.
- the compound can be chemically modified sufficiently and efficiently on the surface of the composite reverse osmosis membrane.
- the above concentration is 1% by weight or less in 100% by weight of the aqueous solution, it does not adversely affect the properties of the film, which is more preferable.
- "% by weight" may be expressed as "wt%".
- the ambient temperature when the composite reverse osmosis membrane is immersed in the aqueous solution containing the above compounds is not particularly limited, and may be, for example, 0°C to 35°C.
- the reverse osmosis composite membrane Before immersing the reverse osmosis composite membrane in the aqueous solution containing the above compound, the reverse osmosis composite membrane may be left standing in pure water for, for example, 30 minutes.
- the reverse osmosis composite membrane is immersed in an aqueous solution containing a water-soluble carbodiimide compound and an aqueous solution containing an active esterifying agent, respectively. , may be immersed.
- SWC4 (Nitto Denko Corporation), which is a commercially available composite reverse osmosis membrane, was allowed to stand in pure water for 30 minutes.
- MES 2-morpholinoethanesulfonic acid
- EDC 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride
- the reverse osmosis composite membrane was immersed in a buffer solution of 2-morpholinoethanesulfonic acid (MES) containing a stabilizer of N-hydroxysuccinimide (NHS) for 15 minutes.
- MES 2-morpholinoethanesulfonic acid
- NHS N-hydroxysuccinimide
- the reverse osmosis composite membrane is immersed in an aqueous solution containing various concentrations (0 wt%, 1 wt%, 3 wt%, or 5 wt%) of the compound in polymer or monomer form for 12 hours in a sealed state at room temperature. , and under dark conditions, the reverse osmosis composite membrane and the compound were allowed to react.
- the reverse osmosis composite membrane was stored in pure water until it was used for testing.
- An embodiment of the present invention may have the following configuration.
- ⁇ 1> A compound having an amino group, wherein the amino group is modified with two ⁇ -picolyl groups, and the surface is chemically modified with a compound having a dipicolylamine structure represented by the following formula (1):
- R is independently selected from the group consisting of a hydrogen atom, a halogen atom, a nitro group, a cyano group, an amino group, an alkyl group having 1 to 6 carbon atoms, and an alkoxy group having 1 to 6 carbon atoms. and may be the same or different, and the dipicolylamine structure may be complexed with the metal M).
- R is independently selected from the group consisting of a hydrogen atom, a halogen atom, a nitro group, a cyano group, an amino group, an alkyl group having 1 to 6 carbon atoms, and an alkoxy group having 1 to 6 carbon atoms. and may be the same or different, and the dipicolylamine structure may be complexed with the metal M).
- n is an integer of 1 or more, and X is a functional group that binds to the carboxyl group.
- n is an integer of 1 or more, and X is a functional group that binds to the carboxyl group.
- ⁇ 4> The composite reverse osmosis membrane according to any one of ⁇ 1> to ⁇ 3>, wherein the dipicolylamine structure forms a complex with metal M.
- ⁇ 5> The composite reverse osmosis membrane according to any one of ⁇ 1> to ⁇ 3>, wherein the dipicolylamine structure does not form a complex with the metal M.
- SWC4 (Nitto Denko Corporation), which is a commercially available composite reverse osmosis membrane, was allowed to stand in pure water for 30 minutes.
- MES 2-morpholinoethanesulfonic acid
- EDC 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride
- the reverse osmosis composite membrane was immersed in a buffer solution of 2-morpholinoethanesulfonic acid (MES) containing an active esterifying agent of N-hydroxysuccinimide (NHS) for 15 minutes.
- MES 2-morpholinoethanesulfonic acid
- NHS N-hydroxysuccinimide
- the reverse osmosis composite membrane is immersed in an aqueous solution containing various concentrations (0 wt%, 1 wt%, 3 wt%, or 5 wt%) of the compound in polymer or monomer form for 12 hours in a sealed state at room temperature. , and under dark conditions, the reverse osmosis composite membrane and the compound were allowed to react.
- the reverse osmosis composite membrane was stored in pure water until it was used for testing.
- the reverse osmosis composite membrane includes (1) a reverse osmosis composite membrane bound with various concentrations (1 wt%, 3 wt%, or 5 wt%) of a polymer-form compound, (2) a specific concentration (1 wt%) of a reverse osmosis composite membrane.
- a reverse osmosis composite membrane with a compound bound in monomeric form and (3) a reverse osmosis composite membrane without a compound bound (Control) were used.
- a reverse osmosis composite membrane with an area of 8.041 ⁇ 10 4 cm 2 and SurPASS 3 manufactured by Anton Paar
- the pH was changed using 0.05 M HCl and 0.1 M KOH.
- a supporting electrolyte of 1 mM KCl the ⁇ potential of the reverse osmosis composite membrane was measured.
- reverse osmosis composite membranes bound with monomeric compounds are more likely to be in polymer form.
- compound-bound reverse osmosis composite membranes For example, in the aspect of producing fresh water from seawater, a reverse osmosis composite membrane bound with a monomeric compound produces more seawater per unit time than a reverse osmosis composite membrane bound with a polymer compound. The amount of fresh water produced from the membrane increased, indicating a higher capacity of the composite reverse osmosis membrane.
- a composite reverse osmosis membrane cut to a size of 25 mm x 25 mm was immersed in a 10 mM zinc nitrate aqueous solution under sterile conditions.
- the reverse osmosis composite membrane was taken out from the zinc nitrate aqueous solution, and excess zinc nitrate aqueous solution was wiped off from the reverse osmosis composite membrane.
- This operation yielded a composite reverse osmosis membrane bound with a polymer-form compound in which at least a portion of the dipicolylamine structure formed a complex with zinc metal (Zn 2+ ).
- the composite reverse osmosis membrane was then subjected to E.I. coli ATCC 25922, or S.
- a culture solution of A. aureus ATCC 25923 was added (inoculum number: 9.4 ⁇ 10 4 CFU) and cultured for 24 hours.
- Inhibition (%) refers to Control's E.M. coli or S.
- the percentage of colony number (CFU) of C. aureus is shown. Therefore, the lower the “inhibition (%)” value, the higher the antibacterial activity of the composite reverse osmosis membrane.
- the composite reverse osmosis membrane of this example is manufactured by S.K. aureus (a Gram-positive bacterium) and E. showed antibacterial activity against both E. coli (Gram-negative bacteria), but E. than S. coli (Gram-negative bacteria). aureus (Gram-positive bacteria) showed higher antibacterial activity.
- reverse osmosis composite membranes cut to size of 25 mm ⁇ 25 mm were immersed in 0.5 mM zinc nitrate aqueous solution under sterile conditions.
- the reverse osmosis composite membrane was taken out from the zinc nitrate aqueous solution, and excess zinc nitrate aqueous solution was wiped off from the reverse osmosis composite membrane.
- This operation yielded a composite reverse osmosis membrane bound with a monomeric compound in which at least a portion of the dipicolylamine structure formed a complex with zinc metal (Zn 2+ ).
- a culture test of two types of bacteria described later was conducted.
- the composite reverse osmosis membrane was then subjected to E.I. coli ATCC 25922, or S.
- a culture solution of A. aureus ATCC 25923 was added (inoculum number: 1.5 ⁇ 10 5 CFU) and cultured for 24 hours.
- Inhibition (%) refers to Control's E.M. coli or S.
- the percentage of colony number (CFU) of C. aureus is shown. Therefore, the lower the “inhibition (%)” value, the higher the antibacterial activity of the composite reverse osmosis membrane.
- the reverse osmosis composite membrane of this example is manufactured by S.K. aureus (a Gram-positive bacterium) and E. showed antibacterial activity against both S. coli (Gram-negative bacteria), E. aureus (Gram-positive) rather than E. showed higher antibacterial activity against E. coli (Gram-negative bacteria).
- the reverse osmosis composite membrane of this example exhibited high antibacterial activity regardless of the presence or absence of Zn2 + . This indicates that the reverse osmosis composite membrane of this example does not require metals for its antibacterial activity.
- E.I. A culture solution of E. coli ATCC 25922 was added (inoculum number: 5 ⁇ 10 2 CFU) and cultured for 24 hours.
- Fig. 1 shows the test results.
- FIG. 1 is a graph showing the results of evaluating the antibacterial activity of a composite reverse osmosis membrane (composite reverse osmosis membrane to which a monomeric compound is bound) according to one embodiment of the present invention.
- a composite reverse osmosis membrane composite reverse osmosis membrane to which a monomeric compound is bound
- FIG. 1 in Control, E.P.
- the number of colonies (CFU) of E. coli ATCC 25922 was about 3.8 ⁇ 10 5 CFU.
- a bacterial count of about 3.8 ⁇ 10 5 CFU is closer to the actual bacterial count in seawater or treated water than the bacterial count of about 3 ⁇ 10 8 CFU shown in Tables 2 and 3.
- the composite reverse osmosis membrane of this example was able to react with E.E. It showed very high antibacterial activity against E. coli (Gram-negative bacteria).
- the present invention can be widely used in the technology of producing fresh water from seawater and the technology of purifying water.
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Abstract
Description
<1>アミノ基を有する化合物であって、当該アミノ基にα-ピコリル基2分子を修飾してなる、下記式(1)で表されるジピコリルアミン構造を有する化合物が表面に化学修飾されてなる、逆浸透複合膜:
<2>上記化合物は、下記式(2)で表されるものである、<1>に記載の逆浸透複合膜。
<4>上記ジピコリルアミン構造は、金属Mと錯体を形成しているものである、<1>~<3>の何れかに記載の逆浸透複合膜。
<5>上記ジピコリルアミン構造は、金属Mと錯体を形成していないものである、<1>~<3>の何れかに記載の逆浸透複合膜。
以下に示すポリマー形態の化合物(式(2)で表される化合物)、および、モノマー形態の化合物(式(3)で表される化合物)の各々を用いて、化学修飾された逆浸透複合膜を作製した。なお、式(3)で表される化合物について、本実施例では、nが2であり、かつ、Xがアミノ基である化合物を用いた。
2019に記載の方法にしたがって合成した。
逆浸透複合膜としては、(1)種々の濃度(1wt%、3wt%、または、5wt%)のポリマー形態の化合物を結合させた逆浸透複合膜、(2)特定の濃度(1wt%)のモノマー形態の化合物を結合させた逆浸透複合膜、および、(3)化合物を結合させていない逆浸透複合膜(Control)、を用いた。
逆浸透複合膜としては、(1’)種々の濃度(1wt%、または、5wt%)のポリマー形態の化合物を結合させた逆浸透複合膜、(2’)種々の濃度(3wt%、または、5wt%)のモノマー形態の化合物を結合させた逆浸透複合膜、(3’)種々の濃度(0.01wt%、0.1wt%、または、1wt%、)のモノマー形態の化合物を結合させた逆浸透複合膜、および、(4’)化合物を結合させていない逆浸透複合膜(Control)を用いた。
上記(1’)および(4’)の逆浸透複合膜の抗菌活性を、フィルム密着法(JIS Z 2801)変法にしたがって、Zn2+の存在下にて試験した。
上記(2’)および(4’)の逆浸透複合膜の抗菌活性を、フィルム密着法(JIS Z 2801)変法にしたがって、Zn2+の存在下、または、Zn2+の非存在下にて試験した。
上記(3’)および(4’)の逆浸透複合膜の抗菌活性を、フィルム密着法(JIS Z 2801)変法にしたがって、Zn2+の非存在下にて試験した。
Claims (5)
- 上記ジピコリルアミン構造は、金属Mと錯体を形成しているものである、請求項1~3の何れか1項に記載の逆浸透複合膜。
- 上記ジピコリルアミン構造は、金属Mと錯体を形成していないものである、請求項1~3の何れか1項に記載の逆浸透複合膜。
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JP2009045595A (ja) * | 2007-08-22 | 2009-03-05 | Nitto Denko Corp | 複合逆浸透膜及びこれを用いた膜分離方法 |
JP2019528245A (ja) * | 2016-06-30 | 2019-10-10 | ザ ホン コン ユニバーシティ オブ サイエンス アンド テクノロジイ | 表面に使用するコロイド状抗菌および抗生物付着コーティング |
WO2019230543A1 (ja) | 2018-05-31 | 2019-12-05 | 長瀬産業株式会社 | ジピコリルアミン構造を有するポリマー、その製造方法、抗微生物剤および抗菌方法 |
JP2020039993A (ja) | 2018-09-06 | 2020-03-19 | 株式会社神鋼環境ソリューション | 水処理方法及び水処理設備 |
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JP2009045595A (ja) * | 2007-08-22 | 2009-03-05 | Nitto Denko Corp | 複合逆浸透膜及びこれを用いた膜分離方法 |
JP2019528245A (ja) * | 2016-06-30 | 2019-10-10 | ザ ホン コン ユニバーシティ オブ サイエンス アンド テクノロジイ | 表面に使用するコロイド状抗菌および抗生物付着コーティング |
WO2019230543A1 (ja) | 2018-05-31 | 2019-12-05 | 長瀬産業株式会社 | ジピコリルアミン構造を有するポリマー、その製造方法、抗微生物剤および抗菌方法 |
JP2020039993A (ja) | 2018-09-06 | 2020-03-19 | 株式会社神鋼環境ソリューション | 水処理方法及び水処理設備 |
Non-Patent Citations (1)
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EUROPEAN JOURNAL OF MEDICINAL CHEMISTRY, vol. 174, 2019, pages 181 - 197 |
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